CFO estimation for uplink OFDM systems

An application of the variable projection method

Xiang Nian Zengt, Ali Ghrayeb, Dun Mao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we propose a joint carrier frequency offset (CFO) and channel estimation scheme based on the well known variable projection (VP) method for the uplink channel of orthogonal frequency division multiplexing (OFDM) systems. The CFOs and channel coefficients are estimated by minimizing the least-squares (LS) cost function through a numerical optimization technique. In each iteration, the CFOs and channel coefficients are updated separately, which distinguishes the VP method from an existing method in which the CFOs and channel coefficients are treated together as a whole. We demonstrate through several numerical examples the superiority of the proposed scheme in terms of convergence speed, computational complexity and estimation performance with regard to CFO estimation. However, the proposed scheme does not provide reliable estimation for the channel coefficients. We will investigate this problem further in our future research work.

Original languageEnglish
Title of host publication2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008
DOIs
Publication statusPublished - 2008
Externally publishedYes
Event2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008 - Poznan, Poland
Duration: 15 Sep 200818 Sep 2008

Other

Other2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008
CountryPoland
CityPoznan
Period15/9/0818/9/08

Fingerprint

Orthogonal frequency division multiplexing
Channel estimation
Cost functions
Computational complexity

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Zengt, X. N., Ghrayeb, A., & Mao, D. (2008). CFO estimation for uplink OFDM systems: An application of the variable projection method. In 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008 [4699704] https://doi.org/10.1109/PIMRC.2008.4699704

CFO estimation for uplink OFDM systems : An application of the variable projection method. / Zengt, Xiang Nian; Ghrayeb, Ali; Mao, Dun.

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008. 2008. 4699704.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Zengt, XN, Ghrayeb, A & Mao, D 2008, CFO estimation for uplink OFDM systems: An application of the variable projection method. in 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008., 4699704, 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008, Poznan, Poland, 15/9/08. https://doi.org/10.1109/PIMRC.2008.4699704
Zengt XN, Ghrayeb A, Mao D. CFO estimation for uplink OFDM systems: An application of the variable projection method. In 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008. 2008. 4699704 https://doi.org/10.1109/PIMRC.2008.4699704
Zengt, Xiang Nian ; Ghrayeb, Ali ; Mao, Dun. / CFO estimation for uplink OFDM systems : An application of the variable projection method. 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008. 2008.
@inproceedings{a5e717c2ae164263a728c54493d06cfa,
title = "CFO estimation for uplink OFDM systems: An application of the variable projection method",
abstract = "In this paper, we propose a joint carrier frequency offset (CFO) and channel estimation scheme based on the well known variable projection (VP) method for the uplink channel of orthogonal frequency division multiplexing (OFDM) systems. The CFOs and channel coefficients are estimated by minimizing the least-squares (LS) cost function through a numerical optimization technique. In each iteration, the CFOs and channel coefficients are updated separately, which distinguishes the VP method from an existing method in which the CFOs and channel coefficients are treated together as a whole. We demonstrate through several numerical examples the superiority of the proposed scheme in terms of convergence speed, computational complexity and estimation performance with regard to CFO estimation. However, the proposed scheme does not provide reliable estimation for the channel coefficients. We will investigate this problem further in our future research work.",
author = "Zengt, {Xiang Nian} and Ali Ghrayeb and Dun Mao",
year = "2008",
doi = "10.1109/PIMRC.2008.4699704",
language = "English",
isbn = "9781424426447",
booktitle = "2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008",

}

TY - GEN

T1 - CFO estimation for uplink OFDM systems

T2 - An application of the variable projection method

AU - Zengt, Xiang Nian

AU - Ghrayeb, Ali

AU - Mao, Dun

PY - 2008

Y1 - 2008

N2 - In this paper, we propose a joint carrier frequency offset (CFO) and channel estimation scheme based on the well known variable projection (VP) method for the uplink channel of orthogonal frequency division multiplexing (OFDM) systems. The CFOs and channel coefficients are estimated by minimizing the least-squares (LS) cost function through a numerical optimization technique. In each iteration, the CFOs and channel coefficients are updated separately, which distinguishes the VP method from an existing method in which the CFOs and channel coefficients are treated together as a whole. We demonstrate through several numerical examples the superiority of the proposed scheme in terms of convergence speed, computational complexity and estimation performance with regard to CFO estimation. However, the proposed scheme does not provide reliable estimation for the channel coefficients. We will investigate this problem further in our future research work.

AB - In this paper, we propose a joint carrier frequency offset (CFO) and channel estimation scheme based on the well known variable projection (VP) method for the uplink channel of orthogonal frequency division multiplexing (OFDM) systems. The CFOs and channel coefficients are estimated by minimizing the least-squares (LS) cost function through a numerical optimization technique. In each iteration, the CFOs and channel coefficients are updated separately, which distinguishes the VP method from an existing method in which the CFOs and channel coefficients are treated together as a whole. We demonstrate through several numerical examples the superiority of the proposed scheme in terms of convergence speed, computational complexity and estimation performance with regard to CFO estimation. However, the proposed scheme does not provide reliable estimation for the channel coefficients. We will investigate this problem further in our future research work.

UR - http://www.scopus.com/inward/record.url?scp=69949185592&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=69949185592&partnerID=8YFLogxK

U2 - 10.1109/PIMRC.2008.4699704

DO - 10.1109/PIMRC.2008.4699704

M3 - Conference contribution

SN - 9781424426447

BT - 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008

ER -